Hearing results after type III tympanoplasty: incus transposition versus PORP. A systematic review

Abstract

Objective: The objective of this study is to compare hearing improvements in the air-bone gap (ABG) after type III tympanoplasties, comparing between incus transposition (IT) and partial ossicular replacement prosthesis (PORP).

Materials and methods: Publications in English were searched in PUBMED database and were systematically reviewed. A total of 14 articles were included, obtaining 1055 patients, 614 for the IT group and 441 for the PORP group. Preoperative ABG, postoperative ABG, dB gain and ABG closure rate were compared.

Results: IT group: preoperative ABG of 31.74 dB (SD 10.51); postoperative ABG of 18.97 dB (SD 10.6); dB gain of 12.76 dB (SD 14.97); and ABG closure rate of 64.48%. PORP group: preoperative ABG of 28.02 dB (SD 10.47); postoperative ABG of 16.27 dB (SD 10.45); dB gain of 11.75 (SD 15.02); and ABG closure rate of 71.32%. No significant statistical difference was found in dB mean gain between groups (p > .05), although a difference was found in the ABG closure rate between groups favouring PORP series (p < .05).

Conclusion: An improvement in hearing results was observed within both groups after type III tympanoplasty. There is no difference in decibels gained between both ossiculoplasty materials, but a better closure rate (%) was observed in the PORP group.

Chinese abstract

目的：本研究的目的是比较Ⅲ型鼓室成形术后气骨间隙（ABG）的听力改善, 将砧骨移位（IT）与部分听骨替代假体（PORP）进行比较。

材料和方法：在PUBMED数据库中检索英语资料, 并进行系统的审查。共纳入14篇文章, 获得1055例患者, IT组群614例, PORP组群441例。比较术前ABG、术后ABG、dB获益和ABG闭合率。

结果：IT组群：术前ABG为31.74 dB（SD 10.51）；术后ABG为18.97 dB（SD10.6）； dB获益为12.76 dB（SD 14.97）； ABG闭合率达64.48％。 PORP组群：术前ABG为28.02 dB（SD 10.47）；术后ABG为16.27 dB（SD 10.45）；dB获益为11.75（SD 15.02）；ABG闭合率为71.32％。尽管在两个组群之间ABG闭合率发现有差异, 其有利于PORP系列（p <.05）, 但是在两个组群平均dB获益之间没有发现显著的统计学差异（p > .05）。

结论：在III型鼓室成形术后, 两个组群患者的听力均有所改善。两种听骨成形材料之间的分贝获益没有差异, 但在PORP组群中观察到更好的闭合率（％）。

Keywords:

• Type III tympanoplasty
• incus
• PORP
• ossiculoplasty
• ossicular chain

Disclosure statement

The authors certify that they have no affiliations or involvement in any organization or entity with any financial interest or non-financial interest in the subject matter or materials discussed in this manuscript. The authors report no conflicts of interest. The authors alone are responsible for the content and writing of this article.